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Table 3 Kappa results for CKD stage classification

From: Design and evaluation of a mobile application to assist the self-monitoring of the chronic kidney disease in developing countries

Category Kappa Concordance Index (95.0%)
Stage 1 0.6890 0.5440 0.8339
Stage 2 0.4795 0.2962 0.6626
Stage 3 0.9706 0.9099 1.0312
Stage 4 1.0000 1.0000 1.0000
Global Kappa 0.7285 0.5979 0.8589